安全门地铁火灾工况排烟模拟与实验研究

Simulation and Experimental Investigation of Smoke Extraction in Metro with Safety Door under Fire Conditions

近年很多城市地铁车站已经安装安全门系统,当列车在站台发生火灾时,安全门系统将会影响到车站的烟气流动和温度分布。本文通过场模拟与网络模拟耦合得出安全门的等效阻力系数,在安全门等效阻力系数下,通过地铁热环境模拟软件STESS模拟得出各连接口风量,将这些模拟量作为边界条件代入FDS进行场模拟。通过FDS模拟通风排烟工况下的车站的温度、风速、能见度情况,结合实际的风速数据测量和分析,得到有利于人员疏散的通风排烟模式。

In recent years,in many cities there are already security doors installed in metro station,the security door system will affect the distribution of the flow of smoke and temperature in station when there is fire on train at the station.In this paper,the equivalent resistance coefficient of the security door has been worked out by the coupling of the field simulation and network simulation.The volume of air entering is worked out by the simulation with STESS under that equivalent resistance coefficient,they will be used as boundary condition substituted into the FDS field simulation.The air temperature in the station,the speed of wind and visibility of the station is worked out by the simulation of FDS in simulation ventilation and smoke exhaustion conditions.Combined with the measurement and analysis of the actual wind speed data,the smoke exhaustion evacuation mode,which is conducive for evacuation,is worked out.